Newton's lantern slide catalogue: section 2 (circa 1920)

43, Museum Street, London, W.C.1. 105 WT THE FALL OF A WATER DROP ■ j* Plain Slides , 9l. Ihe Set of Four. | 4 Portion* of Water Jet under the Influence of Vibrating Fork PHOTOGRAPHS OF RIPPLES. * 4 By Dr. J. H. Vincent. moBtrating aoonatical and optical phenomena by photographs of ripples on the trarfaoe of nr „ „ , mercury and water. Messrs. Newton * Co. have the sole right of reproduction of these negatives. Plain Photographs,'2s. 6d. each. TK RIPPLES ON MERCURY. niostratlng Paper in *' Philosophical Magazine,’’ June, 1897. la Interference. Two point sources same phase. The straight lines are these of minimum disturbance* they are hyperbolas of which the oentres of diiturbantw are the fool 8a Interference, showing eon focal hyperboles and elHnn*, the latter belnp In to* centre ig the light oval curves Illustrate Mealin’! expert- Ba Interference meats 4a Beats. The carved light lines of minimum dist'irbanoe route towa'ds their convexities 6a One point source and a reflecting line produolnt Lloyd's bands 7a Vlrtusl Image In plane rectilinear reflector 8a Virtual image la concave reflector Ba Bpherioat aberration In concave mirror ■* i Virtual image is ferenoe fringe 10 a Virtual image In convex reflector, showing Inter- s'" U Two seUot ripples propagated independently. * one four times as rapid as the other ITL. _ RIPPLES ON MERCURY. Philosophical Magazine,” February, 1898 11a Plane rectilinear waves brought to a focus In ooncave reflector, showing two series of para- bolic interference fringes 12a Reflection of plane (linear) waves In a plane (linear) reflector, showing diffraction B. ;U Ripples due to sgiUtlon of support of mercury ,* trough by a musical note SB Ripples dua to aglUtlou of support of mercury S trough by noise ?8B Point souroe and Its Image at equal distances from oonoavs reflector, showing conjugate £66 Spurious ripple focus r,6b Oonjugite fool of ellipse Souroe at oentre of ellipse, showing two fod 00 nj agate to the centra near each end of ellipse 8b Plane diffraction grating effect produoed by tea equidistant soaroes i ; • 96 Analogous to a none mate In optics 10b Ripples caused by J card out to represent s median section of a ptrcolar bods plate. This and No. 9b Illustrate the fact that the focal length of a acne piste Is leu for rod than for n blue light ‘ ' r T- lib Refraction In a prism 3 12b Refraction In three droular patches of a covered with water STM c. fcl« Doppler’s principle ' 1 by Ss Waves formed £y motion of a style along the surface of the meronry 8e Interferenoe between two sources of nearly the same frequency, 190 and 170 ie ) To get wide interferenoe bands In optlos, the two point sources must be near together. The so arc-■ In these photographs vibrate In opposite phase Too brig.tllnrsof minimum disturbance decrease in number as the souroes approach each other until In No. 6c only the oentre band Is left RIPPLES ON MERCURY. " PhiloBOphical Magazine,” September, 1698. 1e Young’s experiment Be Aragii’a experiment to test Newton's emission pie ) I experiment V theory Pc Rowland’s oonoave grating 10 aour*>es, fro- quency 170 10c let rfer-noe pattern produoed by throe point souroes vibrating in same phase lie Ripples caused by impact of a shot <’ 12c Ripples caused by a ricochet "N D. * Id Refraction of plana (rectilinear) wave* in a plane ET'^w freotiilaear) surface , —traction through a prism ff V Pringes analogous to those Joined by a bl-prima f J . caused by a glass oylinder Just submerged, the P lr wave* being retarded in passing over the r " shallow portion. I Refraction In a medium of Increasing optical I density * RIPPLES ON WATER SURFACE. " Philosophical Magazine,'’ October, 1899. 64 Refraction of spherioal (circular) waves la a E l ana (straight line), thosring also Ucjd’SJ &nd« dne to reflection 74 Refraction of plane (reotilinear) wavee I 64 Refraction of • pheri cial (oiroalar) waves Is a 1' giving plan* rectilinear waves